A Boston summer just wouldn’t be a Boston summer without parties on the roof, sailing on the Charles, asphyxiating Green Line rides, margaritas on Newbury Street, and free Elizabethan theater at the Parkman Bandstand on Boston Common. Pack a picnic, grab your blanket, and renew your love for iambic pentameter when the Commonwealth Shakespeare Company turns a plot of the city’s central green space into the Forest of Arden for the Bard’s timeless comedy, As You Like It. It’s the slapstick romance of exiled royalty, cross-dressing, bad timing, unfulfilled promises, and hilarious missteps that underscores life’s absurd theatrics. As the young Lord Jacques reminds us: “All the world’s a stage.”